196
FNCA52 TJSJ 101930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST MON AUG 10 2026
DISCUSSION
THE ISLANDS CONTINUE WITH CRITICAL FUELS AS MODERATE TO EXTREME
DROUGHT LEVELS PERSIST. THE LATEST SATELLITE-DERIVED PRODUCTS
SHOW LINGERING MOISTURE ASSOCIATED WITH A TROPICAL WAVE ACROSS
THE CWA, WITH A DRIER AIRMASS IN THE LOW TO MID LEVELS FILTERING
INTO THE REGION. NEVERTHELESS, RH VALUES DROPPED DURING THE
MORNING HOURS, PARTICULARLY ACROSS THE SOUTHERN COASTAL PLAINS OF
PUERTO RICO, BELOW THRESHOLDS (< 55%). ADDITIONALLY, BREEZY TO
LOCALLY WINDY CONDITIONS CONTINUE ACROSS THE ISLANDS, AS RAWS
STATIONS REPORTED WINDS BETWEEN 15 - 25 MPH AND GUSTS UP TO
35 MPH. TAKING INTO CONSIDERATION THE DRY FUELS AND KDBIS WELL
ABOVE THRESHOLDS, THE FIRE DANGER THREAT SHOULD REMAIN ELEVATED
TODAY; THE FIRE DANGER STATEMENT CONTINUES IN EFFECT THROUGH 5 PM
AST. RESIDENTS AND VISITORS ARE ENCOURAGED TO AVOID OUTDOOR
BURNING, AS CONDITIONS WILL LIKELY BE FAVORABLE FOR WILDFIRE
IGNITION AND RAPID SPREAD.
PRZ014-110800-
SOUTHEAST COASTAL PLAINS-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 40 0 30
TEMP (24H TREND) 76 (-1) 90 (-2) 75 92
RH % (24H TREND) 85 (+1) 51 (+2) 91 48
WIND 20FT/EARLY(MPH) E 12 E 16 G23 E 14 E 16 G23
WIND 20FT/LATE(MPH) NE 9 E 18 G27 E 10 E 16 G23
MIXING HGT(FT-AGL/MSL) 5740 5090
TRANSPORT WND (MPH) E 17 E 20
VENT RATE (KT-FT) 86100 86530
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-110800-
SOUTHERN HILLS-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 60 10 30
TEMP (24H TREND) 72 (-3) 88 (0) 71 90
RH % (24H TREND) 96 (+5) 61 (+1) 98 59
WIND 20FT/EARLY(MPH) E 12 E 13 E 12 E 13
WIND 20FT/LATE(MPH) NE 13 E 16 E 12 SE 13
MIXING HGT(FT-AGL/MSL) 6320 5660
TRANSPORT WND (MPH) E 16 SE 17
VENT RATE (KT-FT) 88480 84900
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-110800-
NORTH COASTAL PLAINS-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 50 50 10 50
TEMP (24H TREND) 76 (-2) 89 (-2) 74 93
RH % (24H TREND) 98 (+5) 65 (+2) 99 60
WIND 20FT/EARLY(MPH) E 18 E 17 E 19 E 14
WIND 20FT/LATE(MPH) E 12 E 21 SE 12 E 20
MIXING HGT(FT-AGL/MSL) 4950 5650
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 79200 96050
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-110800-
NORTHERN HILLS-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 60 0 60
TEMP (24H TREND) 73 (-2) 87 (-2) 72 91
RH % (24H TREND) 99 (+3) 69 (+6) 99 62
WIND 20FT/EARLY(MPH) E 16 E 14 E 16 E 12
WIND 20FT/LATE(MPH) E 11 E 18 E 6 E 17
MIXING HGT(FT-AGL/MSL) 5690 6490
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 79660 84370
DISPERSION 5 5
DSI 5 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-110800-
WEST COAST-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 80 30 30
TEMP (24H TREND) 74 (-1) 91 (-2) 74 93
RH % (24H TREND) 95 (+1) 62 (+3) 99 61
WIND 20FT/EARLY(MPH) E 12 E 16 E 12 E 16
WIND 20FT/LATE(MPH) NE 17 E 14 E 12 E 16
MIXING HGT(FT-AGL/MSL) 5060 4830
TRANSPORT WND (MPH) E 10 E 15
VENT RATE (KT-FT) 45540 62790
DISPERSION 5 5
DSI 4 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-110800-
EASTERN INTERIOR-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 60 20 50
TEMP (24H TREND) 73 (-3) 88 (-1) 73 91
RH % (24H TREND) 98 (+4) 64 (+3) 100 58
WIND 20FT/EARLY(MPH) E 13 E 13 E 14 E 14
WIND 20FT/LATE(MPH) E 13 E 13 E 14 E 14
MIXING HGT(FT-AGL/MSL) 6760 6330
TRANSPORT WND (MPH) E 16 SE 18
VENT RATE (KT-FT) 94640 101280
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-110800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 60 40 50
TEMP (24H TREND) 71 (-3) 84 (+1) 70 87
RH % (24H TREND) 99 (+3) 69 (-3) 100 66
WIND 20FT/EARLY(MPH) E 10 E 12 E 12 E 13
WIND 20FT/LATE(MPH) E 10 E 11 E 11 E 13
MIXING HGT(FT-AGL/MSL) 4570 4810
TRANSPORT WND (MPH) E 16 SE 20
VENT RATE (KT-FT) 63980 81770
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-110800-
CENTRAL MOUNTAIN RANGE-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 10 80 10 50
TEMP (24H TREND) 70 (-2) 86 (+1) 69 88
RH % (24H TREND) 98 (+2) 70 (+4) 100 65
WIND 20FT/EARLY(MPH) E 11 E 11 E 9 E 11
WIND 20FT/LATE(MPH) E 11 E 11 E 6 SE 11
MIXING HGT(FT-AGL/MSL) 6950 6930
TRANSPORT WND (MPH) E 14 SE 13
VENT RATE (KT-FT) 83400 76230
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-110800-
CAYEY MOUNTAIN RANGE-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 20 30
TEMP (24H TREND) 72 (-2) 84 (-1) 71 87
RH % (24H TREND) 99 (+2) 70 (+3) 100 67
WIND 20FT/EARLY(MPH) E 10 E 12 E 10 E 12
WIND 20FT/LATE(MPH) NE 10 E 12 E 10 E 12
MIXING HGT(FT-AGL/MSL) 5710 5400
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 85650 86400
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-110800-
VIEQUES-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 30 40
TEMP (24H TREND) 79 (-2) 88 (-2) 79 92
RH % (24H TREND) 89 (+4) 63 (+1) 88 55
WIND 20FT/EARLY(MPH) E 16 E 16 E 17 E 16
WIND 20FT/LATE(MPH) E 16 E 14 E 17 E 16
MIXING HGT(FT-AGL/MSL) 3470 3390
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 58990 61020
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-110800-
CULEBRA-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 20 40
TEMP (24H TREND) 79 (-2) 89 (0) 79 92
RH % (24H TREND) 91 (+4) 66 (0) 92 61
WIND 20FT/EARLY(MPH) E 16 E 16 E 17 E 16
WIND 20FT/LATE(MPH) E 16 E 16 E 17 E 17
MIXING HGT(FT-AGL/MSL) 3430 3210
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 58310 57780
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-110800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 50 10 0
TEMP (24H TREND) 75 (-2) 90 (-2) 75 92
RH % (24H TREND) 85 (+1) 54 (+2) 93 51
WIND 20FT/EARLY(MPH) E 14 E 16 G23 E 14 E 18 G27
WIND 20FT/LATE(MPH) NE 16 E 18 G27 E 17 SE 18 G28
MIXING HGT(FT-AGL/MSL) 5520 4890
TRANSPORT WND (MPH) E 15 E 23
VENT RATE (KT-FT) 71760 97800
DISPERSION 5 5
DSI 3 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-110800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 20 40
TEMP (24H TREND) 78 (-2) 86 (-1) 78 91
RH % (24H TREND) 90 (+3) 67 (0) 92 60
WIND 20FT/EARLY(MPH) E 17 E 16 E 18 E 17
WIND 20FT/LATE(MPH) E 17 E 16 E 17 E 17
MIXING HGT(FT-AGL/MSL) 3330 3150
TRANSPORT WND (MPH) E 18 E 22
VENT RATE (KT-FT) 53280 59850
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-110800-
ST CROIX-
330 PM AST MON AUG 10 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 10 40
TEMP (24H TREND) 78 (-2) 87 (-2) 78 91
RH % (24H TREND) 92 (+4) 67 (+2) 92 62
WIND 20FT/EARLY(MPH) E 14 E 16 E 16 E 17
WIND 20FT/LATE(MPH) E 14 E 14 E 16 E 17
MIXING HGT(FT-AGL/MSL) 4860 4640
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 77760 83520
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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